EXHIBIT 16.1

June 30, 2025
Securities and Exchange Commission
100 F Street, N.E.
Washington, DC 20549
Commissioners:
We have been furnished with a copy of the response to Item 4.01 of Form 8-K for the event that occurred on June 27, 2025, to be filed by our former client, PrimeEnergy Resources Corporation. We agree with the statements made in response to that Item insofar as they relate to our Firm.
Very truly yours,
/s/ Grassi & Co., CPAs, P.C.
Grassi & Co., CPAs, P.C.